A Poway address and a Rancho Bernardo address do not share one city government. Poway is an incorporated city. Rancho Bernardo is a City of San Diego community planning area. Your defensible-space plan starts with the parcel, not the neighborhood name.

Confirm three things before anyone cuts. Name the city or county that controls the lot. Name the fire authority that covers it. Mark the property line and any recorded easement. A mailing address is not enough.

Why Poway and Rancho Bernardo need different plans

Poway writes its own tree and land-use rules. It also has its own fire department and a Wildfire Defensible Space Program. Confirm the lot on Poway’s map and with Poway Fire. Rancho Bernardo is a City of San Diego community served by City Fire-Rescue, including Station 33. Use the City’s defensible-space guide for property owners. Fire service, a postal city, and a water district do not settle planning jurisdiction.

If the lot is a county island, County Planning and Development Services handles clearing questions. PDS-800 treats brushing and native-vegetation removal as clearing. Fire clearing still stops at your property line. It also has to match the fire district’s written requirements. Recorded open-space easement conditions still apply. You cannot clear a neighbor’s slope because the fire map looks continuous.

How do the zones work on your lot?

CAL FIRE describes defensible space in rings from the house. The ring stops at the property line if that is closer. Local fire authorities can be stricter. Read that page for spacing that matches slope and plants. Do not treat one slope percentage as a countywide rule.

The first five feet

CAL FIRE describes the first five feet as the ember-resistant zone, Zone 0. The Board of Forestry approved its Zone 0 final draft on August 19, 2026. As of September 5, 2026, OAL listed emergency file 2026-0828-03E as under review. That statewide package is not yet a filed, effective law. Local requirements can still apply now. The City of San Diego’s defensible-space guide already describes Zone 0 and allows maintained trees there. Poway Fire can have its own written clearance for the same five feet.

Give the fire authority your parcel or APN. Confirm what it wants in those first five feet now. Do not assume every living plant has to come out. Do not assume a new statewide rule is already in force.

Zone 1, within 30 feet

Treat Zone 1 as the area within 30 feet of structures. Stop at the property line if it is closer. The Board page places Zone 1 from 5 to 30 feet. Keep the first five feet as its own question for the fire authority.

The aim is less continuous fuel next to the house, not a stripped lot. Dead debris and dense brush against walls are common problems. Plants that carry fire into the canopy matter too. Exact spacing depends on the plants and the slope. Confirm those numbers on the CAL FIRE page and with the local authority.

Zone 2, 30 to 100 feet

Zone 2 runs from 30 to 100 feet, or to the property line. This is a fuel-reduction area. It is not a requirement to clear every shrub to dirt. Stay on your parcel. If an easement or habitat overlay covers the outer yard, that overlay still matters.

For the countywide tree-clearance walkthrough, see defensible space tree requirements in San Diego.

Which trees can you keep?

Fire clearance is not a blanket removal order. Native trees, heritage trees, street trees, and habitat overlays can still need approval.

In Poway, section 12.32.150 requires a Development Services permit for native or heritage tree removal. The definitions name coast live oak, canyon live oak, Engelmann oak, and California sycamore as native. Heritage status is a City Council designation, not every large tree. On commercial or industrial lots, living trees over three inches in diameter also need that permit. Public Works Urban Forestry handles public-tree permits. Calling a tree a fire hazard does not replace that review.

In Rancho Bernardo, City of San Diego street trees are a City decision. Street-tree maintenance uses a no-fee permit after City inspection for trimming, removal, planting, and root pruning. Other removal requests are evaluated under Council Policy 200-5. A private crew’s schedule is not permission to take a City tree. Report City-maintained trees through Get It Done. Check private-yard trees on the parcel for development and habitat overlays. A backyard tree is not exempt just because it is not in the parkway.

CDFW describes February through August as typical nesting for many species. Nesting can happen at other times. A consulting biologist can survey before vegetation removal. Do not move or inspect an active nest yourself.

How should crews prune, instead of stripping the yard?

ISA’s mature-tree pruning guidance says each cut needs a purpose. A general upper guideline is 25 percent of foliage, and less on mature trees. That is not a yearly quota. Routine thinning does not automatically make a tree healthier. Heavy stripping and topping weaken structure. Lion-tailing, clearing the inner and lower crown, does the same.

Name the dead wood, ladder fuels, and clearance the fire authority asked for. Keep healthy interior foliage unless there is a stated reason to take it. Large-tree work, work above ground, and powered equipment belong with a qualified tree professional. Do not put a ladder on the roof.

Do not prune toward power lines. If a tree is growing toward overhead lines, call SDG&E before any private cutting. If a line is down, stay away. Call 911 and SDG&E at 1-800-411-7343. Do not wait to decide whether the line is live.

When should you inspect, and when should you prune?

Walk the lot when fuels change, after wind, and before the driest stretch. That is inspection, not a mandate to thin every winter.

Pruning time follows the tree, not a fire-season slogan. Most deciduous fruit trees are assessed in winter, when the structure is visible. UC times apricot and cherry pruning for mid to late summer, before rain. That timing is about Eutypa risk on those hosts. Citrus often needs little pruning. Inland lots may wait until after frost. Native oaks need a plan for species, condition, and goal. They do not need a countywide heavy-cut month. Palms are not on an annual haircut schedule. Dead or broken fronds and fruit clusters are different from healthy green foliage.

A fire-safe tree trimming checklist for San Diego is a planning aid. It is not a permit and it is not a survival guarantee.

Saw and chipper work near dry grass belongs with a qualified crew. Follow the fire authority’s current restrictions.

What should a quote include?

Branch Pro San Diego is a referral service. We match you with licensed, independent local tree service pros. The crews we send do the work. You contract and pay them directly. They are licensed and insured. Before you sign, ask the crew to show the CSLB classification for this scope. Confirm who files any required permit. If foliage is near overhead lines, call SDG&E before any private cutting. If you want an ISA credential checked, ask that person for their digital certificate or look them up in ISA’s directory.

A useful quote should pin down:

  • The city or county on the APN, not just the mail city
  • The fire authority you already confirmed, and any written clearance they issued
  • Property lines, slopes, and recorded easements
  • Which trees stay, which Poway native or heritage trees need a Development Services permit, and which Rancho Bernardo trees are City street trees
  • Access for trucks and chippers, and who handles debris
  • Who applies for any required permit
  • That line conflicts go to SDG&E, not a private saw

Land clearing is the service page when the job is brush and fuel reduction, not a single backyard prune.

Frequently asked questions

Do Poway and Rancho Bernardo use the same fire department?

No. Poway Fire covers Poway. Rancho Bernardo uses City of San Diego Fire-Rescue. Confirm the fire authority on the actual parcel. Do not copy a neighbor’s flyer across the city line.

Is Zone 0 required on my house today?

The Board of Forestry approved a Zone 0 package on August 19, 2026. As of September 5, 2026, OAL listed that filing as under review. It is not a filed, effective statewide law. Local requirements can still apply now. The City of San Diego’s defensible-space guide already describes Zone 0 and allows maintained trees. Give the fire authority your parcel or APN. Confirm what it is enforcing on that lot now.

Can I clear past my fence if the canyon continues?

No. Stay on your property. PDS-800 limits fire clearing to property boundaries and the fire district’s written requirements. Easements can restrict work even inside your line.

Will clearing the yard make the house fireproof?

Clearing does not make a house fireproof. Defensible space reduces ignition paths. Survival still depends on weather, construction, and the fire itself.

When to call

If a tree is growing toward overhead lines, call SDG&E first. Do not send a private crew until the utility says the line work is clear. If a line is down, stay away. Call 911 and SDG&E at 1-800-411-7343 from a safe place. After the utility releases the scene, call (858) 400-4423 for independent tree work. We’ll connect you with a licensed tree pro in our network. Have the parcel or APN, photos of the trees, and any fire-authority note ready. The quote should match the lot you actually own.